What is Planescape and what is its relation to Dragonlance?
Planescape is a campaign setting that details all the different planes of existence that comprise D&D’s multiverse. Krynn, the world of Dragonlance, has been mentioned in Planescape products. Krynn is basically viewed as a backwater world by the Planescape folk. Not many people on Krynn travel the planes, though it is through Planescape that the wandering Kender have infected other D&D worlds. Krynn’s gods theoretically inhabit the Planes, though they seem to be pretty focused on Krynn (except for Paladine and Takhisis, who are also known as Bahamut and Tiamat in the multiverse). See also question 8.8.
